From: Jean Abou Samra <jean@abou-samra.fr>
To: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Cc: 66057@debbugs.gnu.org
Subject: bug#66057: (ice-9 match) allows invalid usages of ... or ..1
Date: Mon, 18 Sep 2023 11:28:31 +0200 [thread overview]
Message-ID: <aecd361b4b4f982709823cfcce1a1f2329394698.camel@abou-samra.fr> (raw)
In-Reply-To: <8734zc70us.fsf@gmail.com>
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Le dimanche 17 septembre 2023 à 20:59 -0400, Maxim Cournoyer a écrit :
> It's mentioned in the Guile Reference manual; see info "(guile) Pattern
> Matching":
> >
> > So your example is just binding the string "Printer" to the variable "..1":
> > since "..1" doesn't have any special meaning, it's just a pattern variable.
>
> Unless I misread the doc, it should '..1' is a special case '...', which
> means "one or more" instead of "zero or more".
OK, my bad, I didn't know that. You're right that "..1" is mistreated here, it
should be compiled as "one or more repetitions" but instead gets compiled as a
pattern variable. That's a bug, indeed — I believe the expected behavior is that
"..1" behaves like "...", namely being allowed in the middle of a list.
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prev parent reply other threads:[~2023-09-18 9:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-17 18:17 bug#66057: (ice-9 match) allows invalid usages of ... or ..1 Maxim Cournoyer
2023-09-17 18:36 ` Jean Abou Samra
2023-09-18 0:59 ` Maxim Cournoyer
2023-09-18 9:28 ` Jean Abou Samra [this message]
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